diff --git a/web/dart/navbar.dart b/web/dart/navbar.dart
index 4fd5af4..7993b79 100644
--- a/web/dart/navbar.dart
+++ b/web/dart/navbar.dart
@@ -1,79 +1,100 @@
 import 'dart:html';
 import 'dart:svg';
 
+// You will see here and there some 'tabindex' attributes added to various HTML
+// elements, and I’m sure you will ask "Why? They don’t serve any purpose, do
+// they?". Well you are wrong. Webkit has a **terrible** implementation of
+// `:focus-within`, and the dropdowns will **not** work unless the parent
+// element, in this case a `<li>` has a `tabindex` attribute set to `0` and its
+// first child set to `-1`.
+//
+// Screw WebKit, and screw Apple for using such a terrible web engine.
+
 // Icons from https://materialdesignicons.com/
 final icons = {
-  'home': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M10,20V14H14V20H19V12H22L12,3L2,12H5V20H10Z" /></svg>'),
-
-  'pages': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M19,2L14,6.5V17.5L19,13V2M6.5,5C4.55,5 2.45,5.4 1,6.5V21.16C1,21.41 1.25,21.66 1.5,21.66C1.6,21.66 1.65,21.59 1.75,21.59C3.1,20.94 5.05,20.5 6.5,20.5C8.45,20.5 10.55,20.9 12,22C13.35,21.15 15.8,20.5 17.5,20.5C19.15,20.5 20.85,20.81 22.25,21.56C22.35,21.61 22.4,21.59 22.5,21.59C22.75,21.59 23,21.34 23,21.09V6.5C22.4,6.05 21.75,5.75 21,5.5V7.5L21,13V19C19.9,18.65 18.7,18.5 17.5,18.5C15.8,18.5 13.35,19.15 12,20V13L12,8.5V6.5C10.55,5.4 8.45,5 6.5,5V5Z" /></svg>'),
-
-  'toc': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M3,4H7V8H3V4M9,5V7H21V5H9M3,10H7V14H3V10M9,11V13H21V11H9M3,16H7V20H3V16M9,17V19H21V17H9"/></svg>'),
-
-  'share': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M18,16.08C17.24,16.08 16.56,16.38 16.04,16.85L8.91,12.7C8.96,12.47 9,12.24 9,12C9,11.76 8.96,11.53 8.91,11.3L15.96,7.19C16.5,7.69 17.21,8 18,8A3,3 0 0,0 21,5A3,3 0 0,0 18,2A3,3 0 0,0 15,5C15,5.24 15.04,5.47 15.09,5.7L8.04,9.81C7.5,9.31 6.79,9 6,9A3,3 0 0,0 3,12A3,3 0 0,0 6,15C6.79,15 7.5,14.69 8.04,14.19L15.16,18.34C15.11,18.55 15.08,18.77 15.08,19C15.08,20.61 16.39,21.91 18,21.91C19.61,21.91 20.92,20.61 20.92,19A2.92,2.92 0 0,0 18,16.08Z" /></svg>'),
-
-  'twitter': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M22.46,6C21.69,6.35 20.86,6.58 20,6.69C20.88,6.16 21.56,5.32 21.88,4.31C21.05,4.81 20.13,5.16 19.16,5.36C18.37,4.5 17.26,4 16,4C13.65,4 11.73,5.92 11.73,8.29C11.73,8.63 11.77,8.96 11.84,9.27C8.28,9.09 5.11,7.38 3,4.79C2.63,5.42 2.42,6.16 2.42,6.94C2.42,8.43 3.17,9.75 4.33,10.5C3.62,10.5 2.96,10.3 2.38,10C2.38,10 2.38,10 2.38,10.03C2.38,12.11 3.86,13.85 5.82,14.24C5.46,14.34 5.08,14.39 4.69,14.39C4.42,14.39 4.15,14.36 3.89,14.31C4.43,16 6,17.26 7.89,17.29C6.43,18.45 4.58,19.13 2.56,19.13C2.22,19.13 1.88,19.11 1.54,19.07C3.44,20.29 5.7,21 8.12,21C16,21 20.33,14.46 20.33,8.79C20.33,8.6 20.33,8.42 20.32,8.23C21.16,7.63 21.88,6.87 22.46,6Z" /></svg>'),
-
-  'reddit': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M14.5 15.41C14.58 15.5 14.58 15.69 14.5 15.8C13.77 16.5 12.41 16.56 12 16.56C11.61 16.56 10.25 16.5 9.54 15.8C9.44 15.69 9.44 15.5 9.54 15.41C9.65 15.31 9.82 15.31 9.92 15.41C10.38 15.87 11.33 16 12 16C12.69 16 13.66 15.87 14.1 15.41C14.21 15.31 14.38 15.31 14.5 15.41M10.75 13.04C10.75 12.47 10.28 12 9.71 12C9.14 12 8.67 12.47 8.67 13.04C8.67 13.61 9.14 14.09 9.71 14.08C10.28 14.08 10.75 13.61 10.75 13.04M14.29 12C13.72 12 13.25 12.5 13.25 13.05S13.72 14.09 14.29 14.09C14.86 14.09 15.33 13.61 15.33 13.05C15.33 12.5 14.86 12 14.29 12M22 12C22 17.5 17.5 22 12 22S2 17.5 2 12C2 6.5 6.5 2 12 2S22 6.5 22 12M18.67 12C18.67 11.19 18 10.54 17.22 10.54C16.82 10.54 16.46 10.7 16.2 10.95C15.2 10.23 13.83 9.77 12.3 9.71L12.97 6.58L15.14 7.05C15.16 7.6 15.62 8.04 16.18 8.04C16.75 8.04 17.22 7.57 17.22 7C17.22 6.43 16.75 5.96 16.18 5.96C15.77 5.96 15.41 6.2 15.25 6.55L12.82 6.03C12.75 6 12.68 6.03 12.63 6.07C12.57 6.11 12.54 6.17 12.53 6.24L11.79 9.72C10.24 9.77 8.84 10.23 7.82 10.96C7.56 10.71 7.2 10.56 6.81 10.56C6 10.56 5.35 11.21 5.35 12C5.35 12.61 5.71 13.11 6.21 13.34C6.19 13.5 6.18 13.62 6.18 13.78C6.18 16 8.79 17.85 12 17.85C15.23 17.85 17.85 16.03 17.85 13.78C17.85 13.64 17.84 13.5 17.81 13.34C18.31 13.11 18.67 12.6 18.67 12Z" /></svg>'),
-
-  'email': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M20,8L12,13L4,8V6L12,11L20,6M20,4H4C2.89,4 2,4.89 2,6V18A2,2 0 0,0 4,20H20A2,2 0 0,0 22,18V6C22,4.89 21.1,4 20,4Z" /></svg>'),
-
-  'linkedin': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M19 3A2 2 0 0 1 21 5V19A2 2 0 0 1 19 21H5A2 2 0 0 1 3 19V5A2 2 0 0 1 5 3H19M18.5 18.5V13.2A3.26 3.26 0 0 0 15.24 9.94C14.39 9.94 13.4 10.46 12.92 11.24V10.13H10.13V18.5H12.92V13.57C12.92 12.8 13.54 12.17 14.31 12.17A1.4 1.4 0 0 1 15.71 13.57V18.5H18.5M6.88 8.56A1.68 1.68 0 0 0 8.56 6.88C8.56 5.95 7.81 5.19 6.88 5.19A1.69 1.69 0 0 0 5.19 6.88C5.19 7.81 5.95 8.56 6.88 8.56M8.27 18.5V10.13H5.5V18.5H8.27Z" /></svg>'),
-
-  'facebook': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M12 2.04C6.5 2.04 2 6.53 2 12.06C2 17.06 5.66 21.21 10.44 21.96V14.96H7.9V12.06H10.44V9.85C10.44 7.34 11.93 5.96 14.22 5.96C15.31 5.96 16.45 6.15 16.45 6.15V8.62H15.19C13.95 8.62 13.56 9.39 13.56 10.18V12.06H16.34L15.89 14.96H13.56V21.96A10 10 0 0 0 22 12.06C22 6.53 17.5 2.04 12 2.04Z" /></svg>'),
-
-  'theme': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M12,18V6A6,6 0 0,1 18,12A6,6 0 0,1 12,18M20,15.31L23.31,12L20,8.69V4H15.31L12,0.69L8.69,4H4V8.69L0.69,12L4,15.31V20H8.69L12,23.31L15.31,20H20V15.31Z" /></svg>'),
-
-  'sun': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M3.55,18.54L4.96,19.95L6.76,18.16L5.34,16.74M11,22.45C11.32,22.45 13,22.45 13,22.45V19.5H11M12,5.5A6,6 0 0,0 6,11.5A6,6 0 0,0 12,17.5A6,6 0 0,0 18,11.5C18,8.18 15.31,5.5 12,5.5M20,12.5H23V10.5H20M17.24,18.16L19.04,19.95L20.45,18.54L18.66,16.74M20.45,4.46L19.04,3.05L17.24,4.84L18.66,6.26M13,0.55H11V3.5H13M4,10.5H1V12.5H4M6.76,4.84L4.96,3.05L3.55,4.46L5.34,6.26L6.76,4.84Z" /></svg>'),
-
-  'lightbulb': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M12,6A6,6 0 0,1 18,12C18,14.22 16.79,16.16 15,17.2V19A1,1 0 0,1 14,20H10A1,1 0 0,1 9,19V17.2C7.21,16.16 6,14.22 6,12A6,6 0 0,1 12,6M14,21V22A1,1 0 0,1 13,23H11A1,1 0 0,1 10,22V21H14M20,11H23V13H20V11M1,11H4V13H1V11M13,1V4H11V1H13M4.92,3.5L7.05,5.64L5.63,7.05L3.5,4.93L4.92,3.5M16.95,5.63L19.07,3.5L20.5,4.93L18.37,7.05L16.95,5.63Z" /></svg>'),
-
-  'moon': SvgElement.svg('<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M17.75,4.09L15.22,6.03L16.13,9.09L13.5,7.28L10.87,9.09L11.78,6.03L9.25,4.09L12.44,4L13.5,1L14.56,4L17.75,4.09M21.25,11L19.61,12.25L20.2,14.23L18.5,13.06L16.8,14.23L17.39,12.25L15.75,11L17.81,10.95L18.5,9L19.19,10.95L21.25,11M18.97,15.95C19.8,15.87 20.69,17.05 20.16,17.8C19.84,18.25 19.5,18.67 19.08,19.07C15.17,23 8.84,23 4.94,19.07C1.03,15.17 1.03,8.83 4.94,4.93C5.34,4.53 5.76,4.17 6.21,3.85C6.96,3.32 8.14,4.21 8.06,5.04C7.79,7.9 8.75,10.87 10.95,13.06C13.14,15.26 16.1,16.22 18.97,15.95M17.33,17.97C14.5,17.81 11.7,16.64 9.53,14.5C7.36,12.31 6.2,9.5 6.04,6.68C3.23,9.82 3.34,14.64 6.35,17.66C9.37,20.67 14.19,20.78 17.33,17.97Z" /></svg>'),
+  'home': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M10,20V14H14V20H19V12H22L12,3L2,12H5V20H10Z" /></svg>'),
+  'pages': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M19,2L14,6.5V17.5L19,13V2M6.5,5C4.55,5 2.45,5.4 1,6.5V21.16C1,21.41 1.25,21.66 1.5,21.66C1.6,21.66 1.65,21.59 1.75,21.59C3.1,20.94 5.05,20.5 6.5,20.5C8.45,20.5 10.55,20.9 12,22C13.35,21.15 15.8,20.5 17.5,20.5C19.15,20.5 20.85,20.81 22.25,21.56C22.35,21.61 22.4,21.59 22.5,21.59C22.75,21.59 23,21.34 23,21.09V6.5C22.4,6.05 21.75,5.75 21,5.5V7.5L21,13V19C19.9,18.65 18.7,18.5 17.5,18.5C15.8,18.5 13.35,19.15 12,20V13L12,8.5V6.5C10.55,5.4 8.45,5 6.5,5V5Z" /></svg>'),
+  'toc': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M3,4H7V8H3V4M9,5V7H21V5H9M3,10H7V14H3V10M9,11V13H21V11H9M3,16H7V20H3V16M9,17V19H21V17H9"/></svg>'),
+  'share': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M18,16.08C17.24,16.08 16.56,16.38 16.04,16.85L8.91,12.7C8.96,12.47 9,12.24 9,12C9,11.76 8.96,11.53 8.91,11.3L15.96,7.19C16.5,7.69 17.21,8 18,8A3,3 0 0,0 21,5A3,3 0 0,0 18,2A3,3 0 0,0 15,5C15,5.24 15.04,5.47 15.09,5.7L8.04,9.81C7.5,9.31 6.79,9 6,9A3,3 0 0,0 3,12A3,3 0 0,0 6,15C6.79,15 7.5,14.69 8.04,14.19L15.16,18.34C15.11,18.55 15.08,18.77 15.08,19C15.08,20.61 16.39,21.91 18,21.91C19.61,21.91 20.92,20.61 20.92,19A2.92,2.92 0 0,0 18,16.08Z" /></svg>'),
+  'twitter': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M22.46,6C21.69,6.35 20.86,6.58 20,6.69C20.88,6.16 21.56,5.32 21.88,4.31C21.05,4.81 20.13,5.16 19.16,5.36C18.37,4.5 17.26,4 16,4C13.65,4 11.73,5.92 11.73,8.29C11.73,8.63 11.77,8.96 11.84,9.27C8.28,9.09 5.11,7.38 3,4.79C2.63,5.42 2.42,6.16 2.42,6.94C2.42,8.43 3.17,9.75 4.33,10.5C3.62,10.5 2.96,10.3 2.38,10C2.38,10 2.38,10 2.38,10.03C2.38,12.11 3.86,13.85 5.82,14.24C5.46,14.34 5.08,14.39 4.69,14.39C4.42,14.39 4.15,14.36 3.89,14.31C4.43,16 6,17.26 7.89,17.29C6.43,18.45 4.58,19.13 2.56,19.13C2.22,19.13 1.88,19.11 1.54,19.07C3.44,20.29 5.7,21 8.12,21C16,21 20.33,14.46 20.33,8.79C20.33,8.6 20.33,8.42 20.32,8.23C21.16,7.63 21.88,6.87 22.46,6Z" /></svg>'),
+  'reddit': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M14.5 15.41C14.58 15.5 14.58 15.69 14.5 15.8C13.77 16.5 12.41 16.56 12 16.56C11.61 16.56 10.25 16.5 9.54 15.8C9.44 15.69 9.44 15.5 9.54 15.41C9.65 15.31 9.82 15.31 9.92 15.41C10.38 15.87 11.33 16 12 16C12.69 16 13.66 15.87 14.1 15.41C14.21 15.31 14.38 15.31 14.5 15.41M10.75 13.04C10.75 12.47 10.28 12 9.71 12C9.14 12 8.67 12.47 8.67 13.04C8.67 13.61 9.14 14.09 9.71 14.08C10.28 14.08 10.75 13.61 10.75 13.04M14.29 12C13.72 12 13.25 12.5 13.25 13.05S13.72 14.09 14.29 14.09C14.86 14.09 15.33 13.61 15.33 13.05C15.33 12.5 14.86 12 14.29 12M22 12C22 17.5 17.5 22 12 22S2 17.5 2 12C2 6.5 6.5 2 12 2S22 6.5 22 12M18.67 12C18.67 11.19 18 10.54 17.22 10.54C16.82 10.54 16.46 10.7 16.2 10.95C15.2 10.23 13.83 9.77 12.3 9.71L12.97 6.58L15.14 7.05C15.16 7.6 15.62 8.04 16.18 8.04C16.75 8.04 17.22 7.57 17.22 7C17.22 6.43 16.75 5.96 16.18 5.96C15.77 5.96 15.41 6.2 15.25 6.55L12.82 6.03C12.75 6 12.68 6.03 12.63 6.07C12.57 6.11 12.54 6.17 12.53 6.24L11.79 9.72C10.24 9.77 8.84 10.23 7.82 10.96C7.56 10.71 7.2 10.56 6.81 10.56C6 10.56 5.35 11.21 5.35 12C5.35 12.61 5.71 13.11 6.21 13.34C6.19 13.5 6.18 13.62 6.18 13.78C6.18 16 8.79 17.85 12 17.85C15.23 17.85 17.85 16.03 17.85 13.78C17.85 13.64 17.84 13.5 17.81 13.34C18.31 13.11 18.67 12.6 18.67 12Z" /></svg>'),
+  'email': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M20,8L12,13L4,8V6L12,11L20,6M20,4H4C2.89,4 2,4.89 2,6V18A2,2 0 0,0 4,20H20A2,2 0 0,0 22,18V6C22,4.89 21.1,4 20,4Z" /></svg>'),
+  'linkedin': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M19 3A2 2 0 0 1 21 5V19A2 2 0 0 1 19 21H5A2 2 0 0 1 3 19V5A2 2 0 0 1 5 3H19M18.5 18.5V13.2A3.26 3.26 0 0 0 15.24 9.94C14.39 9.94 13.4 10.46 12.92 11.24V10.13H10.13V18.5H12.92V13.57C12.92 12.8 13.54 12.17 14.31 12.17A1.4 1.4 0 0 1 15.71 13.57V18.5H18.5M6.88 8.56A1.68 1.68 0 0 0 8.56 6.88C8.56 5.95 7.81 5.19 6.88 5.19A1.69 1.69 0 0 0 5.19 6.88C5.19 7.81 5.95 8.56 6.88 8.56M8.27 18.5V10.13H5.5V18.5H8.27Z" /></svg>'),
+  'facebook': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M12 2.04C6.5 2.04 2 6.53 2 12.06C2 17.06 5.66 21.21 10.44 21.96V14.96H7.9V12.06H10.44V9.85C10.44 7.34 11.93 5.96 14.22 5.96C15.31 5.96 16.45 6.15 16.45 6.15V8.62H15.19C13.95 8.62 13.56 9.39 13.56 10.18V12.06H16.34L15.89 14.96H13.56V21.96A10 10 0 0 0 22 12.06C22 6.53 17.5 2.04 12 2.04Z" /></svg>'),
+  'theme': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M12,18V6A6,6 0 0,1 18,12A6,6 0 0,1 12,18M20,15.31L23.31,12L20,8.69V4H15.31L12,0.69L8.69,4H4V8.69L0.69,12L4,15.31V20H8.69L12,23.31L15.31,20H20V15.31Z" /></svg>'),
+  'sun': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M3.55,18.54L4.96,19.95L6.76,18.16L5.34,16.74M11,22.45C11.32,22.45 13,22.45 13,22.45V19.5H11M12,5.5A6,6 0 0,0 6,11.5A6,6 0 0,0 12,17.5A6,6 0 0,0 18,11.5C18,8.18 15.31,5.5 12,5.5M20,12.5H23V10.5H20M17.24,18.16L19.04,19.95L20.45,18.54L18.66,16.74M20.45,4.46L19.04,3.05L17.24,4.84L18.66,6.26M13,0.55H11V3.5H13M4,10.5H1V12.5H4M6.76,4.84L4.96,3.05L3.55,4.46L5.34,6.26L6.76,4.84Z" /></svg>'),
+  'lightbulb': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M12,6A6,6 0 0,1 18,12C18,14.22 16.79,16.16 15,17.2V19A1,1 0 0,1 14,20H10A1,1 0 0,1 9,19V17.2C7.21,16.16 6,14.22 6,12A6,6 0 0,1 12,6M14,21V22A1,1 0 0,1 13,23H11A1,1 0 0,1 10,22V21H14M20,11H23V13H20V11M1,11H4V13H1V11M13,1V4H11V1H13M4.92,3.5L7.05,5.64L5.63,7.05L3.5,4.93L4.92,3.5M16.95,5.63L19.07,3.5L20.5,4.93L18.37,7.05L16.95,5.63Z" /></svg>'),
+  'moon': SvgElement.svg(
+      '<svg style="width:24px;height:24px" viewBox="0 0 24 24"><path fill="currentColor" d="M17.75,4.09L15.22,6.03L16.13,9.09L13.5,7.28L10.87,9.09L11.78,6.03L9.25,4.09L12.44,4L13.5,1L14.56,4L17.75,4.09M21.25,11L19.61,12.25L20.2,14.23L18.5,13.06L16.8,14.23L17.39,12.25L15.75,11L17.81,10.95L18.5,9L19.19,10.95L21.25,11M18.97,15.95C19.8,15.87 20.69,17.05 20.16,17.8C19.84,18.25 19.5,18.67 19.08,19.07C15.17,23 8.84,23 4.94,19.07C1.03,15.17 1.03,8.83 4.94,4.93C5.34,4.53 5.76,4.17 6.21,3.85C6.96,3.32 8.14,4.21 8.06,5.04C7.79,7.9 8.75,10.87 10.95,13.06C13.14,15.26 16.1,16.22 18.97,15.95M17.33,17.97C14.5,17.81 11.7,16.64 9.53,14.5C7.36,12.31 6.2,9.5 6.04,6.68C3.23,9.82 3.34,14.64 6.35,17.66C9.37,20.67 14.19,20.78 17.33,17.97Z" /></svg>'),
 };
 
+// Get the current page’s title
 String getPageTitle() => querySelector('title').text;
 
+// Create any type of icon
 Element makeIcon(SvgElement t_elem) {
-  final icon = t_elem
-    ..classes.add('nav-icon');
+  final icon = t_elem..classes.add('nav-icon');
   return icon;
 }
 
+// Make the Table of Content in the navbar
 Future<Element> makeToc() async {
   return Element.li()
     ..attributes['id'] = 'toc-drop'
+    ..attributes['tabindex'] = '0'
     ..classes.addAll(['nav-item', 'has-dropdown'])
     ..append(Element.a()
+      ..attributes['tabindex'] = '-1'
       ..attributes['href'] = 'javascript:void(0)'
       ..append(makeIcon(icons['toc'])));
 }
 
+// Make the list of pages in the navbar
 Future<Element> makePages() async {
   var pages = Element.ul()
     ..attributes['id'] = 'drop-page'
     ..classes.add('dropdown');
   return Element.li()
+    ..attributes['tabindex'] = '0'
     ..append(Element.a()
+      ..attributes['tabindex'] = '-1'
       ..attributes['href'] = 'javascript:void(0)'
       ..append(makeIcon(icons['pages'])))
     ..classes.addAll(['nav-item', 'has-dropdown'])
     ..append(pages);
 }
 
-Element makeShareLink(Element t_icon, String t_url) {
-  return Element.li()
-    ..classes.add('dropdown-item')
-    ..append(Element.a()
-      ..attributes['href'] = t_url
-      ..attributes['target'] = '_blank'
-      ..attributes['rel'] = 'noreferrer'
-      ..append(t_icon));
-}
-
+// Make the share icon
 Future<Element> makeShare() async {
+  // Create a share button
+  Element makeShareLink(Element t_icon, String t_url) {
+    return Element.li()
+      ..classes.add('dropdown-item')
+      ..append(Element.a()
+        ..attributes['href'] = t_url
+        ..attributes['target'] = '_blank'
+        ..attributes['rel'] = 'noreferrer'
+        ..append(t_icon));
+  }
+
   return Element.li()
     ..classes.addAll(['nav-item', 'has-dropdown'])
+    ..attributes['tabindex'] = '0'
     ..append(Element.a()
       ..attributes['href'] = 'javascript:void(0)'
+      ..attributes['tabindex'] = '-1'
       ..append(makeIcon(icons['share'])))
     ..append(Element.ul()
       ..classes.add('dropdown')
@@ -94,6 +115,7 @@ Future<Element> makeShare() async {
           'https://www.facebook.com/sharer/sharer.php?u=${window.location.href}')));
 }
 
+// Make the theme changer in the navbar
 Future<Element> makeThemeChanger() async {
   Element makeThemeItem(String t_btnId, String t_text, [Element t_icon]) {
     return Element.li()
@@ -105,8 +127,10 @@ Future<Element> makeThemeChanger() async {
 
   return Element.li()
     ..classes.addAll(['nav-item', 'has-dropdown'])
+    ..attributes['tabindex'] = '0'
     ..append(Element.a()
       ..attributes['href'] = 'javascript:void(0)'
+      ..attributes['tabindex'] = '-1'
       ..append(Element.span()
         ..style.verticalAlign = 'top'
         ..append(makeIcon(icons['theme']))))
@@ -118,6 +142,7 @@ Future<Element> makeThemeChanger() async {
       ..append(makeThemeItem('blackBtn', 'Noir', makeIcon(icons['moon']))));
 }
 
+// Make home button in navbar
 Future<Element> makeHome() async {
   return Element.li()
     ..classes.add('nav-item')
@@ -133,11 +158,11 @@ Future<Element> makeHome() async {
 // - A dropdown to each page detected in the sitemap
 Future<Element> makeNavbar() async {
   final navbar_content = Element.ul()..classes.add('navbar-nav');
-  final home           = await makeHome();
-  final pages          = await makePages();
-  final toc            = await makeToc();
-  final share          = await makeShare();
-  final theme          = await makeThemeChanger();
+  final home = await makeHome();
+  final pages = await makePages();
+  final toc = await makeToc();
+  final share = await makeShare();
+  final theme = await makeThemeChanger();
 
   navbar_content
     ..append(home)